Critical Vulnerability in Ruby Package: Path Manipulation Risk on Windows
Summary
ALPINE-CVE-2021-28966: In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web application handles a parameter with TmpDir. Affects ruby versions < 2.5.9-r0. Fixed in 2.5.9-r0. How to fix ↓
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Background
Ruby is a dynamic, open-source programming language known for its simplicity and productivity. It is widely used for web development, particularly with the Ruby on Rails framework. The language supports multiple programming paradigms and has a rich ecosystem of libraries and tools. However, a vulnerability has been identified that affects Ruby versions through 3.0 on Windows, which could allow remote attackers to exploit path handling in web applications.
Vulnerability Detail
In Ruby versions through 3.0, a vulnerability exists that allows a remote attacker to submit a crafted path when a web application handles a parameter with TmpDir. This could lead to unauthorized access or manipulation of files, potentially compromising the integrity and confidentiality of the application. The vulnerability is classified with a CVSS score of 7.5, indicating a high severity level.
How To Fix
Minimum fixed version
2.5.9-r0
This is the first release that contains the fix.
sudo apk add --upgrade rubyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, consider validating and sanitizing user input for file paths before processing them in your application. This can help mitigate the risk of path manipulation attacks.
Conclusion
The identified vulnerability in Ruby poses a significant risk, particularly for applications running on Windows. It is crucial for developers to update their Ruby installations to the patched versions to mitigate potential threats. Additionally, employing input validation can serve as a temporary measure to enhance security.
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FAQ
The CVSS score of this vulnerability is 7.5, indicating a high severity level.
Ruby versions through 3.0 on Windows are affected by this vulnerability.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The vulnerability could allow remote attackers to manipulate file paths, leading to unauthorized access or data breaches.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
References
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